【Android 初级知识】文字颜色 背景 触摸点击 反馈色 之selector的那些事儿

运行程序，会直接报错的，error如下：

03-16 22:19:14.925 23002-23002/mcxtzhang.selectordemo E/AndroidRuntime: FATAL EXCEPTION: main

Process: mcxtzhang.selectordemo, PID: 23002

java.lang.RuntimeException: Unable to start activity ComponentInfo{mcxtzhang.selectordemo/mcxtzhang.selectordemo.MainActivity}: android.view.InflateException: Binary XML file line #19: Error inflating class Button

at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2581)

at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2656)

at android.app.ActivityThread.access$800(ActivityThread.java:178)

at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1512)

at android.os.Handler.dispatchMessage(Handler.java:111)

at android.os.Looper.loop(Looper.java:194)

at android.app.ActivityThread.main(ActivityThread.java:5691)

at java.lang.reflect.Method.invoke(Native Method)

at java.lang.reflect.Method.invoke(Method.java:372)

at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:959)

at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:754)

Caused by: android.view.InflateException: Binary XML file line #19: Error inflating class Button

at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:763)

at android.view.LayoutInflater.rInflate(LayoutInflater.java:806)

at android.view.LayoutInflater.inflate(LayoutInflater.java:504)

at android.view.LayoutInflater.inflate(LayoutInflater.java:414)

at android.view.LayoutInflater.inflate(LayoutInflater.java:365)

at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:267)

at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:129)

at mcxtzhang.selectordemo.MainActivity.onCreate(MainActivity.java:11)

at android.app.Activity.performCreate(Activity.java:6142)

at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1115)

at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2528)

at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2656)

at android.app.ActivityThread.access$800(ActivityThread.java:178)

at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1512)

at android.os.Handler.dispatchMessage(Handler.java:111)

at android.os.Looper.loop(Looper.java:194)

at android.app.ActivityThread.main(ActivityThread.java:5691)

at java.lang.reflect.Method.invoke(Native Method)

at java.lang.reflect.Method.invoke(Method.java:372)

at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:959)

at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:754)

Caused by: android.content.res.Resources$NotFoundException: File res/drawable/selector_color_bg.xml from drawable resource ID #0x7f02004e

at android.content.res.Resources.loadDrawableForCookie(Resources.java:2767)

at android.content.res.Resources.loadDrawable(Resources.java:2645)

at android.content.res.TypedArray.getDrawable(TypedArray.java:749)

at android.view.View.(View.java:3837)

at android.widget.TextView.(TextView.java:680)

at android.widget.Button.(Button.java:111)

at android.widget.Button.(Button.java:107)

at android.support.v7.widget.AppCompatButton.(AppCompatButton.java:62)

at android.support.v7.widget.AppCompatButton.(AppCompatButton.java:58)

at android.support.v7.app.AppCompatViewInflater.createView(AppCompatViewInflater.java:109)

at android.support.v7.app.AppCompatDelegateImplV7.createView(AppCompatDelegateImplV7.java:963)

at android.support.v7.app.AppCompatDelegateImplV7.onCreateView(AppCompatDelegateImplV7.java:1022)

at android.support.v4.view.LayoutInflaterCompatHC$FactoryWrapperHC.onCreateView(LayoutInflaterCompatHC.java:44)</